Rank 29 documents the Chevron B21 — the Group 6 sports prototype that carried Derek Bennett's Cheshire workshop to Le Mans and sportscar grids across Europe in the early 1970s. The B21's dark green and white livery, number 21, and integrated rear wing captured the moment when British constructors refined closed-cockpit endurance design between the open Lola T70 era and the Group C revolution. Chevron Cars Ltd built reputation on lightweight space-frame chassis and pragmatic aerodynamics rather than factory budgets — the B21 ran with Cosworth and other powerplant options depending on customer specification, and its wedge profile influenced clubman's prototype grids long after works programmes moved on. At Le Mans the B21 family contested the 2-litre and 3-litre classes with the reliability culture that made Chevron a constructor's constructor. Wallimilist renders the three-quarter hero, slanted blue-green geometric frame, CHEVRON B21 title stack, and folklore footer exactly as the master PNG dictates — Endurance · Reserve kicker, SARTHE PROTOTYPE subtitle, and curator copy on La Sarthe heritage.